检索结果-南通市图书馆

Chinese Chemical Letters 1995年第5期6卷 403-406页

作者： Xie, HW Liu, SY Wang, LX shun, yq Chinese Acad Sci Changchun Inst Appl Chem Changchun 130022 Peoples R China

The thermal decmpos ition of polyani line(PAn) and poly-o-toluidine (POT)was studied by means of direct pyrolysis mass spectrometry (DPMS) and MS/MS. The results showed that both benzene-diamine and guinone-diimine units were produced,and the intensities of fragments corresponding to quinone-diimine units increased as the oxidation degrees increased The mechanism of thermal decomposition of PAn and POT was given for the first time.

关键词：

Smart Gas Sensors: Recent Developments and Future Prospective

在线全文

学校读者我要写书评

暂无评论

NANO-MICRO LETTERS 2025年第1期17卷 1-32页

作者： Zong, Boyang Wu, Shufang Yang, Yuehong Li, Qiuju Tao, Tian Mao, shun Tongji Univ Biomed Multidisciplinary Innovat Res Inst Coll Environm Sci & Engn Shanghai East HospState Key Lab Pollut Control & 1239 Siping Rd Shanghai 200092 Peoples R China Shanghai Inst Pollut Control & Ecol Secur Shanghai 200092 Peoples R China Southern Med Univ Zhujiang Hosp Microbiome Med Ctr Dept Lab Med Guangzhou 510280 Peoples R China

Recent developments of advanced electronic and optoelectronic gas sensors are *** array with artificial intelligence algorithms and smart gas sensors in "Internet of Things" paradigm are *** of smart gas sensors in environmental monitoring, medical and healthcare applications, food quality control, and public safety are described. Gas sensor is an indispensable part of modern society with wide applications in environmental monitoring, healthcare, food industry, public safety, etc. With the development of sensor technology, wireless communication, smart monitoring terminal, cloud storage/computing technology, and artificial intelligence, smart gas sensors represent the future of gas sensing due to their merits of real-time multifunctional monitoring, early warning function, and intelligent and automated feature. Various electronic and optoelectronic gas sensors have been developed for high-performance smart gas analysis. With the development of smart terminals and the maturity of integrated technology, flexible and wearable gas sensors play an increasing role in gas analysis. This review highlights recent advances of smart gas sensors in diverse applications. The structural components and fundamental principles of electronic and optoelectronic gas sensors are described, and flexible and wearable gas sensor devices are highlighted. Moreover, sensor array with artificial intelligence algorithms and smart gas sensors in "Internet of Things" paradigm are introduced. Finally, the challenges and perspectives of smart gas sensors are discussed regarding the future need of gas sensors for smart city and healthy living.

关键词： Smart gas sensor Electronic sensor Optoelectronic sensor Flexible and wearable sensor Artificial intelligence

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

体认即反思

河北学刊 2025年第1期45卷 11-19页

作者：沈顺福山东大学易学与中国古代哲学研究中心暨儒学高等研究院

体认是宋明理学的重要概念之一,主要是指由心灵自身所发动的、面对自身的活动。这种对自身的心灵活动便是现代哲学的反思。体认既是对天理的体合、实现心理合一,也是让本性澄明。理学家认为,自然的浊气遮蔽了天生的本性,而体认便是心灵... 详细信息

体认是宋明理学的重要概念之一,主要是指由心灵自身所发动的、面对自身的活动。这种对自身的心灵活动便是现代哲学的反思。体认既是对天理的体合、实现心理合一,也是让本性澄明。理学家认为,自然的浊气遮蔽了天生的本性,而体认便是心灵对气质浑浊的心灵的活动,通过纯洁气质,让性澄明。心理合一也是本性澄明——理即性;对本性的觉察也是对自身身份的觉悟,形成主体——性即体。对性的认可便是对理的接受与遵循;体认天理的活动便是合“理”的超越性活动。

关键词：体认反思理理学

Role of nutrition in diabetes mellitus and infections

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第3期13卷 1-8页

作者： Xue-Lu Yu Li-Yun Zhou Xiao Huang Xin-Yue Li Ming-Ke Wang Ji-shun Yang Naval Medical Center of PLA Naval Medical UniversityShanghai 200052China

In this editorial,we have commented on the article that has been published in the recent issue of World Journal of Clinical *** authors have described a case of unilateral thyroid cyst and have opined that the acute onset of infection may be linked to diabetes mellitus(DM).We have focused on the role of nutrition in the association between DM and *** with DM are at a high risk of infection,which could also be attributed to nutrition-related *** interventions for patients with diabetes are mainly based on a low-calorie diet,which can be achieved by adhering to a low-carbohydrate ***,dietary fiber supplementation is recommended to maintain the diversity of the gut ***,high-quality protein can prevent the increased risk of infection due to *** of vitamins C,vitamins A,vitamins D,and folic acid improves blood sugar control and facilitates immune *** deficiencies augment the risk of infection,but the relationship with diabetes is mostly U-shaped and a good intake should be maintained.

关键词： Diabetes mellitus Infection Macronutrients Vitamins Minerals

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

锗锡浓度对硅锗锡合金性能影响的研究

原子与分子物理学报 2025年第5期42卷 163-174页

作者：顾永顺温淑敏内蒙古工业大学理学院呼和浩特010051

由于SiGeSn合金材料其具有高的载流子迁移率和较长的载流子寿命,并且其结构具有较高的热力学稳定性,所以在光电子领域中是一种具有非常大应用潜力的半导体材料.本文采用密度泛函理论中的广义梯度近似GGA+U的方法,构建并计算了本征半导体... 详细信息

由于SiGeSn合金材料其具有高的载流子迁移率和较长的载流子寿命,并且其结构具有较高的热力学稳定性,所以在光电子领域中是一种具有非常大应用潜力的半导体材料.本文采用密度泛函理论中的广义梯度近似GGA+U的方法,构建并计算了本征半导体Si_(96)与五组掺杂模型Si_(92)Ge_(2)Sn_(2)、Si_(88)Ge_(4)Sn_(4)、Si_(84)Ge_(6)Sn_(6)、Si_(80)Ge_(8)Sn_(8)、Si_(76)Ge_(10)Sn_(10)的电子结构及光学性质.通过对计算结果的分析可知,Ge,Sn的加入使得Si材料的带隙宽度减小,并且发生了由间接带隙向直接带隙的转变;Ge,Sn浓度最高的SiGeSn合金的形成能相对较高,稳定性相较于Ge,Sn含量低的材料较差;随着Ge,Sn掺杂浓度的提高,电子态密度图显示出越来越明显的杂化现象,并且态密度的峰值主要有Si原子的s轨道提供;Ge,Sn浓度的提高还使得SiGeSn合金的吸收系数在可见光及近红外区域内增加、反射率在可见光及以上波段范围内提高、折射率变低、消光系数曲线向红外区域移动等光学性质变化,表明可以通过调节Ge,Sn浓度来获得合适的光学特性,这为SiGeSn半导体在红外区域光电材料和器件的应用上提供了研究方向.

关键词： SiGeSn 电子特性光学性质

维普期刊数据库博看期刊

Long-Range Ordered Nanostructures of Assembling Macromolecules via Rational Design of Kinetic Pathways:A Computational Perspective

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2023年第9期41卷 1318-1328,I0004页

作者： Liang-shun Zhang Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Designing the kinetic pathways of assembling macromolecules such as block copolymers and DNA strands is crucial not only for an achievement of thermodynamically equilibrium nanostructures over macroscopic areas,but also for a better understanding of formation process of higher-level superstructures where well-tailored assemblies act as mesoscopic building *** analysis and computer simulations provide excellent opportunities to microscopically reveal the kinetics and mechanism of structural evolution as well as the collective behaviors of building *** this perspective,we summarize our efforts of theoretical and computational modelling to understand the long-range ordering mechanisms and the organization kinetics of assembling macromolecules along designable ***,we present the computational modelling and recent strategies of designable pathways for the achievement of long-range ***,from the computational views,we give the applications of pathway-designed strategies to explore the ordering mechanism and kinetics in the course of structural evolution,covering the block copolymers and their nanocomposites under zone annealing as well as the hierarchical self-assembly of mesoscopic building units(e.g.,patchy micelles and DNA-functionalized nanoparticles).Finally,we outlook future directions in the field of designable pathways for the achievement of long-range ordered *** perspective could promote further efforts towards the wide applications of theoretical and computational modelling in the construction of soft hybrid metamaterials.

关键词： Dynamic self-consistent field theory Structural evolution Block copolymers Hierarchical self-assembly Polymerization

面向NewSQL数据库数据协同持久化的研究

在线全文

学校读者我要写书评

暂无评论

计算机科学 2025年第1期52卷 131-141页

作者：左顺李永坤许胤龙中国科学技术大学计算机科学与技术学院合肥230026 安徽省高性能计算重点实验室合肥230026

现代NewSQL数据库为了提供数据的高可用性,通常会为数据提供多个副本,以便在某个副本不可用时,可以从其他的副本中获取数据。而在数据多副本的情况下,又需要考虑副本间的数据一致性问题,即在某一时刻不同客户端读取某个数据时得到的结... 详细信息

现代NewSQL数据库为了提供数据的高可用性,通常会为数据提供多个副本,以便在某个副本不可用时,可以从其他的副本中获取数据。而在数据多副本的情况下,又需要考虑副本间的数据一致性问题,即在某一时刻不同客户端读取某个数据时得到的结果应该是相同的,因此引入了事务处理机制。在一个包含多个写操作的交互式事务处理过程中,由于数据存在多个副本,因此每个写入操作需要对所有的主备副本进行写入操作。然而主备副本通常分散在不同的机器上,因此会引入写远端副本的时延,其最终将会增大整个事务的处理时延。针对该问题,提出了数据协同持久化的方案,其主要思想是让客户端在本地缓存事务的写操作日志,在最终提交事务时,客户端首先将事务中的写操作日志进行持久化,并将该日志发送给事务的协调者节点,让协调者进行日志数据的分发处理,从而达到两者协同持久化事务数据的目的。实验结果表明,相较于同步持久化方案,协同持久化方案不仅能降低交互式事务处理的时延,还能提高约38%左右的系统极限吞吐率。

关键词：分布式数据库并发控制数据持久化数据一致性高数据竞争负载

Neutrino masses,leptonic flavor mixing,and muon(g−2)in the seesaw model with the U(1)L_(μ)-L_(r)gauge symmetry

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2022年第1期46卷 1-11页

作者： shun Zhou Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

The latest measurements of the anomalous muon magnetic moment a_(μ)≡(g_(μ)-2)/2show a 4:2σdiscrepancy between the theoretical prediction of the Standard Model and the experimental *** account for such a discrepancy,we consider a possible extension of the type-(I+II)seesaw model for neutrino mass generation with a gauged L_(μ)-L_(r)*** explicitly constructing an economical model with only one extra scalar singlet,we demonstrate that the gauge symmetry U(1)L_(μ)-L_(r)and its spontaneous breaking are crucial not only for explaining the muon result but also for generating the neutrino masses and leptonic flavor *** phenomenological implications and experimental constraints on the model parameters are also discussed.

关键词： neutrino masses anomalous muon magnetic moment U(1)gauge symmetry

Numerical and experimental studies on unsupervised deep Lagrangian learning based rotor balancing method

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2023年第4期66卷 1050-1061页

作者： ZHONG shun HOU Lei Department of Mechanics Tianjin UniversityTianjin 300000China School of Astronautics Harbin Institute of TechnologyHarbin 150001China

Rotor balancing is essential to rotor dynamic *** make the balancing process convenient and costless,a balancing method using unsupervised deep Lagrangian network without weight trail is *** the proposed network,a Lagrangian layer is applied to the network to introduce the physical prior *** to traditional balancing method,trail weight process is not ***,parameter sharing mechanics in baseline design or Lagrangian layer are applied to identify the unbalanced force without labeled *** numerical case study and corresponding experiment are conducted to validate the *** experimental and numerical results find that the proposed rotor balancing approach gives reasonable and comparative results with the considerations of both cost and *** with the baseline,to which no physical prior is applied,the balancing method with Lagrangian mechanism involved could achieve better *** proposed rotor dynamic balancing method gives out an alternative approach of rotor balancing methods.

关键词： rotor balancing unsupervised deep learning Lagrangian layer weight trial experimental rig balancing experiment

THE PREDICTION-CORRECTION LEGENDRE COLLOCATION METHOD FOR NONLINEAR EVOLUTIONARY PROBLEMS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2004年第5期22卷 753-768页

作者： Li-pingHe shun-kaiSun DepartmentofMathematics ShanghaiJiaoTongUniversityShanghai200030China InstituteofAppliedPhysicsAndComputationalMathematics Beijing100088China

The initial-boundary value problem of Burgers equation is considered. A prediction-correction Legendre collocation scheme is presented, which is easy to be performed. Its numerical solution possesses the accuracy of second-order in time and higher order in space. Numerical results are reported, which show the high accuracy of this approach. The techniques used in this paper are also applicable to other nonlinear evolutionary problems.

关键词： Burgers equation Convergence Legendre collocation approximation Numerical results Prediction-correction operator